Pillow/Tests/test_qt_image_qapplication.py

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from __future__ import annotations
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import pytest
from PIL import ImageQt
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from .helper import assert_image_equal_tofile, assert_image_similar, hopper
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if ImageQt.qt_is_installed:
from PIL.ImageQt import QPixmap
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if ImageQt.qt_version == "6":
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from PyQt6.QtCore import QPoint
from PyQt6.QtGui import QImage, QPainter, QRegion
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from PyQt6.QtWidgets import QApplication, QHBoxLayout, QLabel, QWidget
elif ImageQt.qt_version == "side6":
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from PySide6.QtCore import QPoint
from PySide6.QtGui import QImage, QPainter, QRegion
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from PySide6.QtWidgets import QApplication, QHBoxLayout, QLabel, QWidget
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class Example(QWidget):
def __init__(self):
super().__init__()
img = hopper().resize((1000, 1000))
qimage = ImageQt.ImageQt(img)
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pixmap1 = ImageQt.QPixmap.fromImage(qimage)
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QHBoxLayout(self) # hbox
lbl = QLabel(self)
# Segfault in the problem
lbl.setPixmap(pixmap1.copy())
def roundtrip(expected):
result = ImageQt.fromqpixmap(ImageQt.toqpixmap(expected))
# Qt saves all pixmaps as rgb
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assert_image_similar(result, expected.convert("RGB"), 1)
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@pytest.mark.skipif(not ImageQt.qt_is_installed, reason="Qt bindings are not installed")
def test_sanity(tmp_path):
# Segfault test
app = QApplication([])
ex = Example()
assert app # Silence warning
assert ex # Silence warning
for mode in ("1", "RGB", "RGBA", "L", "P"):
# to QPixmap
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im = hopper(mode)
data = ImageQt.toqpixmap(im)
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assert isinstance(data, QPixmap)
assert not data.isNull()
# Test saving the file
tempfile = str(tmp_path / f"temp_{mode}.png")
data.save(tempfile)
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# Render the image
qimage = ImageQt.ImageQt(im)
data = QPixmap.fromImage(qimage)
qt_format = QImage.Format if ImageQt.qt_version == "6" else QImage
qimage = QImage(128, 128, qt_format.Format_ARGB32)
painter = QPainter(qimage)
image_label = QLabel()
image_label.setPixmap(data)
image_label.render(painter, QPoint(0, 0), QRegion(0, 0, 128, 128))
painter.end()
rendered_tempfile = str(tmp_path / f"temp_rendered_{mode}.png")
qimage.save(rendered_tempfile)
assert_image_equal_tofile(im.convert("RGBA"), rendered_tempfile)
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# from QPixmap
roundtrip(hopper(mode))
app.quit()
app = None